More than 357,000 people hours have been worked since construction started at Mount Ousley interchange, with more than one third of the work program now completed.
The new interchange at the base of Mount Ousley will provide improved connectivity, safety and efficiency on a busy and key corridor for freight and other traffic travelling between Sydney and the South Coast.
Transport for NSW executive director partnerships and integration Cassandra Ffrench says this year’s focus was on establishing work areas to allow work to start on the new heavy vehicle safety ramp and the three interchange bridges.
“Bridge piers and retaining walls are now visible for these three new structures that will form the interchange over the M1 Princes Motorway,” she says.
“This year also saw significant progress on the new heavy vehicle safety ramp, and the completion of an upgrade to the pedestrian bridge across the M1 between the University of Wollongong and the TAFE at Northfields Avenue, providing improved accessibility for users.”
Ffrench says next year will see more significant milestones reached with the concrete deck to be poured for the Mount Ousley Road bridge over the heavy vehicle bypass, and the new heavy vehicle safety ramp is set to open.
“Work will also progress to increase the height and width of Mount Ousley Road to meet the new interchange, and work will continue on the new southbound access road to University Avenue,” she says.
“This work will be carried out across four separate 46-hour closures in the first half of the year, designed to reduce impacts to nearby residents and motorists by reducing the duration of night work by nine months.
Major work started in late 2024 and will take four years to complete, weather permitting.
Motorists are advised the project site is now closed until 6am Monday January 5, 2026. During this time, there will be no construction work.
The speed limit on the M1 Princes Motorway between Mount Ousley Road and Memorial Drive will return to 80 km/h during the close down period.
The temporary speed limit of 60 km/h will resume during work hours once work restarts on Monday January 5, 2026.